Slope of a Line Passing through two points (x₁ , y₁) and (x₂ , y₂) is given by :
[tex]\spadesuit\; Slope(m) = \frac{y_1 - y_2}{x_1 - x_2}[/tex]
Given Points are (-2 , -3) and (-4 , -9)
here x₁ = -2 and x₂ = -4 and y₁ = -3 and y₂ = -9
[tex]\spadesuit\;Slope(m) = \frac{-3 + 9}{-2 + 4} = \frac{6}{3} = 3[/tex]
